Only notify clio for PRs targeting the release and master branches (#5794)

Clio should only be notified when releases are about to be made, instead of for all PR, so this change only notifies Clio when a PR targets the release or master branch.

Author: bthomee

.github/workflows/on-pr.yml

@@ -111,7 +111,7 @@ jobs:
     needs:
       - should-run
       - build-test
-    if: ${{ needs.should-run.outputs.go == 'true' }}
+    if: ${{ needs.should-run.outputs.go == 'true' && contains(fromJSON('["release", "master"]'), github.ref_name) }}
     uses: ./.github/workflows/notify-clio.yml
     secrets:
       clio_notify_token: ${{ secrets.CLIO_NOTIFY_TOKEN }}